182 



NATURE STUDY AND LIFE 



the heavy bearing years the wormy apples fall off and are 

 discarded, but the great number of apples serves to rear 

 enormous numbers of the worms, and, according to my 



FIG. 76. THE CODLING MOTH (A LIFE-STORY COLLECTION) 



a, egg; t>, larva; c, cocoons; d, pupa; e, /i, adults; /, work of downy woodpecker on 

 apple bark; g, moth on apple bark, to show protective coloration, (a and h 

 after Slingerland) 



observations and experience, in the off years, when apples 

 would be valuable, the worms take the whole crop. 



Let us first endeavor to gain a practical knowledge of 

 just what the insect is doing in the neighborhood. The 

 study should be undertaken early in the fall. Ask the 

 pupils to examine 100 apples, from their home supply or 



